STK11C88-3
32K x 8 nvSRAM
3.3V QuantumTrap™ CMOS
Nonvolatile Static RAM
Obsolete - Not Recommend for new Deisgns
FEATURES
DESCRIPTION
• 35, 45ns and 55ns Access Times
The Simtek STK11C88-3 is a fast static RAM with a
nonvolatile element incorporated in each static
memory cell. The SRAM can be read and written an
unlimited number of times, while independent non-
volatile data resides in Nonvolatile Elements. Data
transfers from the SRAM to the Nonvolatile Elements
(the STORE operation), or from Nonvolatile Elements
to SRAM (the RECALL operation) are initiated using a
software sequence. Data transfers from the Nonvol-
atile Elements to the SRAM (the RECALL operation)
also occur upon restoration of power.
• STORE to Nonvolatile Elements Initiated by
Software
• RECALL to SRAM Initiated by Software or
Power Restore
• 10 mA Typical Icc at 200 nsec Cycle Time
• Unlimited READ, WRITE and RECALL Cycles
• 1,000,000 STORE Cycles to Nonvolatile Ele-
ments
• 100-Year Data Retention in Nonvolatile Ele-
ments
• Single 3.3V+ 0.3V Operation
• Commercial and Industrial Temperatures
• 28-Pin DIP and SOIC Packages
BLOCK DIAGRAM
PIN CONFIGURATIONS
1
A
A
A
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
CC
W
14
QUANTUM TRAP
2
12
512 x 512
3
A
A
A
A
7
6
5
4
3
2
13
8
A5
A6
A7
A8
4
A
5
A
A
A
A
A
A
DQ
DQ
DQ
9
STORE
6
STORE/
RECALL
CONTROL
11
7
G
STATIC RAM
ARRAY
8
A
E
10
RECALL
A9
9
1
A11
A12
A13
A14
512 x 512
10
11
12
13
14
DQ
DQ
0
7
6
5
28 - 300 PDIP
28 - 600 PDIP
28 - 300 SOIC
28 - 350 SOIC
0
DQ
1
2
DQ
DQ
4
3
SOFTWARE
DETECT
A0 - A13
V
SS
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
PIN NAMES
COLUMN I/O
A
- A
Address Inputs
Write Enable
Data In/Out
COLUMN DEC
0
14
W
DQ - DQ
0
7
A
A0 A1 A2 A3 A4
10
G
E
Chip Enable
Output Enable
Power (+ 3.3V)
Ground
G
E
V
V
CC
SS
W
March 2006
1
Document Control # ML0013 rev 0.2
SIMTEK [ SIMTEK CORPORATION ]
